diff --git a/rust-version b/rust-version
index a4c6cd4418..9885aba102 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-2c6a29af35a81e20f8af4c32bf1b55c59b89eccd
+258256697b8550860be0f6194dec532ac616c2c1
diff --git a/src/helpers.rs b/src/helpers.rs
index cae8f5ddb4..e733ea8062 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -298,7 +298,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
                 trace!("UnsafeCellVisitor: {:?} {:?}", *v, v.layout.ty);
                 let is_unsafe_cell = match v.layout.ty.kind() {
                     ty::Adt(adt, _) =>
-                        Some(adt.did) == self.ecx.tcx.lang_items().unsafe_cell_type(),
+                        Some(adt.did()) == self.ecx.tcx.lang_items().unsafe_cell_type(),
                     _ => false,
                 };
                 if is_unsafe_cell {
diff --git a/src/shims/backtrace.rs b/src/shims/backtrace.rs
index a73c78b627..7d069611e2 100644
--- a/src/shims/backtrace.rs
+++ b/src/shims/backtrace.rs
@@ -134,7 +134,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
 
         let dest = this.force_allocation(dest)?;
         if let ty::Adt(adt, _) = dest.layout.ty.kind() {
-            if !adt.repr.c() {
+            if !adt.repr().c() {
                 throw_ub_format!(
                     "miri_resolve_frame must be declared with a `#[repr(C)]` return type"
                 );